(texinfo) Equivalence

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 `@equiv{}' (==): Indicating Equivalence
 ---------------------------------------
 
   Sometimes two expressions produce identical results.  You can
 indicate the exact equivalence of two forms with the `@equiv{}' command.
 
   The `@equiv{}' command is displayed as `==' in Info and as a three
 parallel horizontal lines in the printed output.
 
   Thus,
 
      @lisp
      (make-sparse-keymap) @equiv{} (list 'keymap)
      @end lisp
 
 produces
 
      (make-sparse-keymap) == (list 'keymap)
 
 This indicates that evaluating `(make-sparse-keymap)' produces
 identical results to evaluating `(list 'keymap)'.
 

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